Alright, let's work through 6210 times 393 step by step
6210 × 393 = 393 × (6210)
+ 393 × 0 resulting in 0
+ 393 × 10 giving us 3930
+ 393 × 200 that equals 78600
+ 393 × 6000 giving us 2358000

= 2440530
